The Case for International Scientific Cooperation
Eight Decades of Microwave Auditory Research and Ten Years of Havana Syndrome Reports Raise Questions Over the Need for a Fresh Investigation
Nearly 80 years of microwave auditory research and a decade of investigations into Havana Syndrome have left important questions unanswered, prompting a case for a fresh international scientific inquiry involving researchers outside the established investigative circles.
Since the first reported incidents in Cuba in 2016, American diplomats, intelligence personnel and other officials have reported unexplained symptoms in countries across Europe, Asia and the Americas. Despite extensive investigations, scientific reviews and intelligence assessments, no universally accepted explanation has emerged for all reported cases.
The international spread of these incidents raises a question: could an independently led investigation, combining new scientific experiments with international medical cooperation, help resolve the remaining uncertainties?
From Havana to London and Beyond
Reports of suspected anomalous health incidents have emerged from Havana, Guangzhou, Vienna, Berlin, Bogotá, Hanoi, Washington DC and other locations.
London also features in the historical record. Two American officials reportedly experienced symptoms while staying at a hotel during President Donald Trump's 2019 state visit to Britain, bringing the reported incidents closer to home.
In August 2021, then US Vice-President Kamala Harris's arrival in Vietnam was delayed by more than three hours after American officials received reports of possible Havana Syndrome incidents in Hanoi. Harris herself was not reported to have been affected, but the security concerns prompted an assessment before her visit continued.
The geographical spread of these reports strengthens the argument for cooperation between affected countries, particularly where medical findings, environmental evidence and investigative records could be independently compared.
A Scientific History Marked by Disagreement
The microwave auditory effect, in which pulsed radiofrequency energy can produce perceived sounds, has been the subject of scientific investigation since the mid-twentieth century.
Researchers including Allan H. Frey, Don R. Justesen, James C. Lin, Chung-Kwang Chou and Kenneth Foster contributed to the field, although their interpretations have not always agreed.
In 1975, Justesen documented experiments conducted by Joseph C. Sharp and Mark Grove at Walter Reed, reporting that recorded speech had been converted into microwave pulses and successfully perceived as intelligible words. This represented a significant development beyond the perception of simple clicks and tones.
One notable dispute emerged in 1979–1980, when Frey and Elaine Coren's holographic experiments attracted published criticism from Chou, Arthur W. Guy, Foster, Robert Galambos and Justesen. Their exchange questioned experimental sensitivity, interpretations of tissue movement and earlier conclusions about cochlear involvement.
Further disagreements have continued over radiofrequency exposure limits, biological effects and the implications of experimental findings.
Although the thermoelastic explanation for microwave hearing is well supported, Justesen's documented account of encoded speech demonstrates why independent replication of more complex auditory experiments remains an important area for scientific reassessment.
The Case for a New Investigation
The continuing uncertainty surrounding reported Havana Syndrome incidents, combined with the extensive history of microwave auditory research, presents an opportunity for a different investigative approach.
A UK–European-led international initiative could bring together independent universities, medical institutions and scientific laboratories, with participation from countries where incidents have been reported.
Crucially, the investigation would be conducted by researchers without previous involvement in the original scientific disputes or government assessments.
One programme could revisit significant historical microwave auditory experiments, including Morse-code perception and encoded speech transmission, using modern equipment, controlled conditions and independently verified results.
A second, separate programme could examine reported Havana Syndrome cases, comparing medical evidence, environmental conditions, potential exposure mechanisms and alternative explanations.
Such an approach would allow the scientific questions to be investigated individually without assuming that microwave auditory effects necessarily explain the reported health incidents.
An Opportunity for International Cooperation
Britain, European nations, Canada and other participating countries could contribute expertise in radiofrequency physics, neuroscience, clinical medicine and forensic investigation.
Independent oversight, transparent funding, shared experimental standards and reproducible results would be central to establishing confidence in the findings.
Previous investigations would remain an important part of the evidence. However, a new inquiry could examine their limitations, identify unresolved questions and determine which experiments or assessments would provide genuinely new information.
Eight Decades Later, What Remains Unanswered?
The scientific record demonstrates that substantial research has taken place. Yet the relationship, if any, between historical microwave auditory experiments and reported Havana Syndrome incidents remains unresolved.
After nearly 80 years of research and a decade of international reports, there is a reasonable case for asking whether the existing investigative approaches have gone as far as they can.
A fresh, independently led international investigation could offer an opportunity to move beyond longstanding disagreements, test outstanding findings and establish conclusions supported by reproducible evidence.
For a subject that has crossed national borders and involved scientists, governments and medical institutions worldwide, international scientific cooperation may offer the most constructive route towards answering the questions that remain.